body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
  }
  
  /* 用于设置组件的通用布局样式，使其水平垂直居中 */
  .center-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }